#1. Aurora Australis occur in the
Aurora Australis occurs in the Southern Hemisphere near the Antarctic region.
#2. Aurora Australis called _____ Lights
Aurora Australis is known as the Southern Lights.
#3. Aurora Borealis occur in the
Aurora Borealis occurs in the Northern Hemisphere near the Arctic region.
#4. Aurora Borealis are called ______ Lights
Aurora Borealis is known as the Northern Lights.
#5. Corona occur in ______ clouds
Corona occurs in altostratus (AS) clouds when sunlight passes through small water droplets.
#6. Bishop's ring is due to the diffraction of light by fine particles of
Bishop's ring appears due to diffraction of sunlight by volcanic dust particles in the upper atmosphere.
#7. The radius of the Bishop's ring is about
The angular radius of Bishop's ring is approximately 32°.
#8. Superior Mirage occurs marked
Superior mirages occur during temperature inversion, when cold air is below warm air.
#9. Inferior Mirage occurs when there is
Inferior mirages occur during a lapse condition where hot air is near the ground.
#10. Corona are formed due to the ______ of light
Corona forms due to diffraction of light around small water droplets.
#11. Corona are formed due to light, passing through
Corona can be formed by mist, fog, or small water/ice particles.
#12. Halo is produced by
Halo is caused by refraction of light through ice crystals in clouds.
#13. Halo is produced when light passes through
Halo occurs when sunlight passes through ice crystals.
#14. Halo occur in the cloud
Halos typically occur in altostratus (AS) clouds.
#15. Halo is luminous ring of ______ radius
The common radius of a halo is 22° around the Sun or Moon.
#16. Halo round the sun shows a pure clear _____ on the outside.
The outer edge of the halo is red due to dispersion of light through ice crystals.
#17. Halo signifies predominance in the cloud of
Halo indicates clouds contain predominantly ice crystals.
#18. The cloud which cause Halo has ______ chances of ice accretion
Clouds producing halos have negligible chance of ice accretion for aircraft.
#19. Sometimes a halo with a radius of ______ is observed, called Large Halo
Large halos have an angular radius of 42°.
#20. Halo occurs from ____ cloud
Halos are high cloud phenomena, occurring in cirrus and cirrostratus clouds.
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